M4 build

M4 Carbine

by Anonymous

Published Dec 29, 2025 · 0 comments

Compatibility: 2 incompatibilities · 2 warnings

GATE Blu-Link V3 MOSFET is a V3 part but the replica uses a V2 gearbox.
PolarStar Airsoft Jack HPA Engine is an HPA-only part — this replica is Electric.
Picked parts target different gearbox versions (V2 and V3).
2 inner-barrel parts picked — only one fits a gearbox.

Built on

G&P M4 Carbine

M4 platform · Price band No-limit

$2,241.00

Build total

$1,901.00

Parts spend

29 of 30

Slots filled

Cost split

Gearbox: $526.00
Core: $510.00
Optics & Accessories: $380.00
Replica: $340.00
Barrel & Hop-Up: $260.00
Externals: $225.00

Slot coverage

Core: Gearbox ShellMotorHPA Engine & Air System
Gearbox: Gear SetSpringPistonPiston HeadCylinderCylinder HeadAir NozzleSpring GuideTappet PlateMOSFET & Trigger GroupBushings & BearingsShock ReductionCylinder / Tune-Up KitTM NGRS Parts
Barrel & Hop-Up: Inner BarrelSniper Inner BarrelHop-Up
Externals: StockFore GripHandstopRails & MountsSuppressorSling
Open: Bipod
Optics & Accessories: OpticWeapon LightLaser

Part list

31 parts

Slot	Component	Price
Replica	G&P M4 CarbineReplicaGATE Blu-Link V3 MOSFET is a V3 part but the replica uses a V2 gearbox.PolarStar Airsoft Jack HPA Engine is an HPA-only part — this replica is Electric.	$340.00
Core
Gearbox Shell	Prometheus Gearbox ShellGearbox Shell · PrometheusPicked parts target different gearbox versions (V2 and V3).	$130.00
Motor	Prometheus High Speed MotorMotor · Prometheus	$80.00
HPA Engine & Air System	PolarStar Airsoft Jack HPA EngineHPA Engine & Air System · PolarStar AirsoftPolarStar Airsoft Jack HPA Engine is an HPA-only part — this replica is Electric.	$300.00
Gearbox
Gear Set	Lonex 12:1 Gear SetGear Set · LonexPicked parts target different gearbox versions (V2 and V3).	$70.00
Spring	Prometheus M110 SpringSpring · Prometheus	$16.00
Piston	Prometheus PistonPiston · Prometheus	$32.00
Piston Head	Prometheus Piston HeadPiston Head · Prometheus	$22.00
Cylinder	Prometheus CylinderCylinder · Prometheus	$25.00
Cylinder Head	Prometheus Cylinder HeadCylinder Head · Prometheus	$28.00
Air Nozzle	Prometheus Air NozzleAir Nozzle · Prometheus	$18.00
Spring Guide	Prometheus Spring GuideSpring Guide · Prometheus	$22.00
Tappet Plate	Prometheus Tappet PlateTappet Plate · Prometheus	$16.00
MOSFET & Trigger Group	Prometheus Cut Off LeverMOSFET & Trigger Group · Prometheus	$16.00
MOSFET & Trigger Group	Prometheus Selector PlateMOSFET & Trigger Group · Prometheus	$20.00
MOSFET & Trigger Group	GATE Blu-Link V3 MOSFETMOSFET & Trigger Group · GATE ElectronicsGATE Blu-Link V3 MOSFET is a V3 part but the replica uses a V2 gearbox.Picked parts target different gearbox versions (V2 and V3).	$80.00
Bushings & Bearings	Prometheus 7mm BearingsBushings & Bearings · Prometheus	$25.00
Shock Reduction	Prometheus Sorbo PadShock Reduction · Prometheus	$16.00
Cylinder / Tune-Up Kit	Prometheus Cylinder SetCylinder / Tune-Up Kit · Prometheus	$90.00
TM NGRS Parts	Prometheus TM NGRS Spring GuideTM NGRS Parts · Prometheus	$30.00
Barrel & Hop-Up
Inner Barrel	Prometheus EG 6.03mm BarrelInner Barrel · Prometheus2 inner-barrel parts picked — only one fits a gearbox.	$85.00
Sniper Inner Barrel	Prometheus 6.01mm Sniper BarrelSniper Inner Barrel · Prometheus2 inner-barrel parts picked — only one fits a gearbox.	$160.00
Hop-Up	Prometheus Soft Hop-Up BuckingHop-Up · Prometheus	$15.00
Externals
Stock	Magpul CTR StockStock · Magpul	$50.00
Fore Grip	Magpul RVG Fore-GripFore Grip · Magpul	$30.00
Handstop	Magpul M-LOK Handstop KitHandstop · Magpul	$20.00
Rails & Mounts	Magpul M-LOK Rail SectionRails & Mounts · Magpul	$15.00
Suppressor	Element PBS-1 SuppressorSuppressor · Element	$60.00
Sling	Magpul MS3 SlingSling · Magpul	$50.00
Optics & Accessories
Optic	EOTech XPS3 Red Dot SightOptic · EOTech	$110.00
Weapon Light	SureFire M600 Ultra Scout LightWeapon Light · SureFire	$150.00
Laser	G&P DBAL-A2 LaserLaser · G&P	$120.00
	Total	$2,241.00

Spec plate

Generated for every build without a photo

The platform, the total and how far down the tune chain this build has gone, drawn as one graphic. Post it as-is — nothing on it is a photo of someone else’s gun.

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Spec plate

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